It's not just the systemic gender discrimination but the fact that women in Japan aren't given a chance to balance careers with marriage/children is what's made this such a sensational story.
1. https://www.works-i.com/column/panelsurveys/%E8%90%A9%E5%8E%...
And I've got a bridge in Brooklyn for you.
This is the sort of prestigious medical school where sons and grandsons and nephews of wealthy families are expected to be able to graduate. When too many of them were suddenly not being admitted because smarter, harder-working women were outclassing them on their exams, the admissions department needed to "calibrate" the superior scores of the female applicants in order to maintain a healthy stream of legacy revenue.
If this article is an acceptable form of desperate measures, I think an equivalent would be Exxon deciding there are too many rich black people, and thus paying black engineers less. (private organization using unfounded information to take an action that doesn't make any sense outside the generally accepted social contract)
The US is deeply imperfect -- but no one will tell you that having had a child you can never, ever go back to your profession.